iPadOS 9.3.1 (build 13E238) is an official Apple over-the-air update for the iPad 2 (Mid 2012), released on 2016-03-31T16:51:17Z. The update package is 217.61 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 92cee92db6007e73f2686d0d510ee75cfe1d57a3.zip.